I've been a long-time fan of Mixcloud, not just because it brought me to Nick Francis's work but it provides some of the best mix of ambient music. I've noticed of late that more non-commercial folk are taking it to heart and that has to be good. In my case, despite the fact that I use Soundcloud and Audioboom, I've never felt the need to post here as well.
If you haven't yet tried it, here's a mix that you may like. (As I type this I'm sitting in my office writing another blog post and plotting the chapters for my book. If this is what happiness is then I'm living it...).
I know we have music streaming to brighten our day, but trust me you'll not find a better array of mixes to brighten your day.